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U.S. risks national blackout from small-scale attack

The U.S. could suffer a coast-to-coast blackout if saboteurs knocked out nine of the country's 55,000 electric-transmission substations on a scorching summer day, according to a previously unreported federal analysis, the Wall Street Journal reports.

The study by the Federal Energy Regulatory Commission concluded that coordinated attacks in each of the nation's three separate electric systems could cause the entire power network to collapse, people familiar with the research said.